Phase-rotation indicator.



PATENTED APR. l1, 1905.

R. F. SGHUGHARDT.

PHASE ROTATION INDICATOR.

APPLICATION FILED HAY 13, 1904.

@2f /1 awww.

RUDOLPH F. SCllUCl'lAltD'l, (,)F CI'IICAGO,

PHASE-ROTATION Patented Apri; 11, 1905.

@Trient ILLINOIS.

INDICATOR.

SPECIFICATION forming part of Letters Patent No. 787,345, dated April 11, 1905.

Application filed May 13, 1904. Serial No. 207,858.

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le it known that l, RUDOLPH F. Sonnen- Ano'r. a citizen ot' the United States, residing at (.hicago` in the county ot' Cook and State of Illinois, have invented a certain new and uset'ul Improvement in Phase-Rotation ludicators. ot' which the following is a full, clear, concise, and exact description, reference being' had to the accompanying' drawings, forming a part ot' this specilication.

motor can be connected properly to rotate in the right direction trom the very start.

lt is the object oi my invention to provide a device by which the phase sequence or rotation can be automatically indicated. To

` such end l provide a device which has a moving part subject to the influences ot the energ'y A\l v invention relates to means t'or iudicatl one direction when the generator is rotated y in one direction and in the reverse order or rotation when the generator is operated in an opposite direction.

It is ot'ten found desirable to ascertain the phase sequence or rotation in a polyphase circuit. where it is desired to connect two generators together to t'eed the same system it is essential, ot' course, that the generators be so connected that they shall impress the same phase sequence or relationship upon the circuit which they are both to Vt'eed. lt is obvious that it will be disastrous to connect the two `generators to the circuit with a diti'erent phase relationship even though they should be synchronixed upon one otl the conductors or wires ot' the plurality ot wires going to make up the polyphase circuit. lt is therefore desirable to ascertain the phase sequence or rotation ot' both generators, so that they may be connected with the circuit with a corresponding phase relationship or rotation. As another exai'nple it is generally desirable to have a motor rotate iu a certain direction, and not only that. but it would often be injurious to have the motor rotated. even to a slightextent, in the wrongl direction. In such case it is again desirable to know the phase ser'luence or rotation ot' the circuit in order that the For example, E

ot' a polyphase circuit and adapted to move in opposite directions, according as the phase sequence or rotation is in one order or direction or another. In the torni of device which lV show herein tor carrying out my invention the movable part is in the lorm ot' a rotarymeinber, and this is conveniently provided with a pointer or linger which moves as the movable member moves and which will thus swing or turn to one side or the other. accordingas the phase rotation is in one direction or the other. l also desirably provide an index which can be moved manually to indicate the direction in which the movable member has indicated to preserve, as it were, a record ot' the indication after it has been made and the instrument disconnected. 'lhus where it is desired to ascertain the phase sequence in the leads oi two different generators to see it they correspond an indication can be made upon the instrument and the index set in accordance with thatv indication, and then the instrument can be disconnected from the leads ot such generator and connected with those ot another, and when the indication ot' the other is made the indication made by the iirst one will be known from the index, and it can be readily seen whether or not this corre spends with the direction oi phase rotation ot the second geiierator. 'l`he device is also desirably provided with a suitable card or tablet bearing suitable inscriptions to indicate the direction oli phase rotation shown by the movement ol the hand or pointer.

ln the accompanying drawings, Figure 1 is a top plan of a device embodying mypresent invention. Fig. 2 is a cross-section taken on line 2 2 in Fig. 1. Figs. El and i are top plan views ot modilied forms ol the invention, and Fig. 5 1s a view ot' a detail ot construction.

'll l\" 'l "FU" 1^ lUt' 1c l tv ice s iown in lgs. am a oi cai rying out the invention is a device operating on the principle of an induction-motor and to such end is provided with a rotary armature 1 and an inductively-related field 2. with coils 3 3, all confined within a casing 4, having a top 5. The armature 1 is provided with a pointer or finger 6, which rotates with said armature, and the top 5 is provided with an index 7 in the form ofl a finger or pointer, and this can be turned by hand by means of a manually-operable spindle 8, mounted in the top 5. Below the rotary finger 6 is a card or tablet 9, which is provided with inscriptions, as shown in Fig. 1. Stops 10 10 are provided to limit the movement of' the pointer or linger 6. Four binding-posts 11, 12, 13, and 14 are provided, the posts 11, 12, and 13 for the three wires of' a polyphase system and the post 14 for a neutral wire. This device will operate as follows: The three wires or leads a 7) c of a three-wire system, for example, will be connected with the binding-posts 11, 12, and 13, and when the circuit is closed through the instrument the finger or pointer 6 will be swung to one side or the other of' the central or Zero position, according to the sequence of' the phases or the direction of' phase rotation.

It' the pointer moves to the right, as shown in Fig. 1, the phase rotation will be in one direction, which will be indicated by the letters C B Athat is, from lead C to B to 14. This means from C to B to Af If', on the other hand, the pointer swings to the leftthat is. to the other side of' the cardgthe sequence ofl phases will be in their reverse orderthat is, the phase rotation will be A B C instead of' GBA. Thus the direction of movement of' the pointer 6 will indicate the sequence of phases ol'A the system. The movement of' the pointer is limited by the stops 10 10, so as to prevent it from setting up a rotation. 1f' now it is desired to learn whether or not the phase rotation of two polyphase systems is the same, taking the conductors in the same order, the conductors from one generator will be first connected to the binding-posts 11, 12, and 13 and the direction of' phase rotation ascertained, as above set forth. The index 7 will then be moved by hand to the side to which the pointer 6 is moved. The instrument Will then be disconnected from the first generator and connected with the second with the conductors in the same relative order. It' now the pointer 6 again moves in the same direction, (which direction will be indicated by the stationary index 7,)the sequence of' phases in the two systems will obviously correspond. 1f, on the other hand, the pointer 6 moves in the opposite direction, this will indicate that the phase rotation of' the second generator is opposite to that of' the first. Hence if it is desired to connect the two systems together with corresponding` phase rotations it will be necessary to interchange any two of the conductors of' either system. To secure sequence of' any two leads where a neutral connection is available, the phases are connected to any two of "A B C posts and the neutral lead to post OJ The device shown in Fig. 3 is an electrostatic motor-that is, a motor having a rotary element operable electrostatically by a threephase or other polyphase system. The device shown comprises a rotary element or rotor constructed with three spokes 15 15 15, provided at their ends with segments 16 16 16 and three stationary wing-segments 17 17 17, mounted one hundred and twenty degrees from one another. In the normal position the segments 16 16 16 are midway between the wings 17 17 17. Inside of the wing-segments 17 17 are three segments 18 18 18 of insulation. Three binding-posts 19, 20, and 21 are provided and connected, respectively, with the three wing-segments 17 17 17, and the rotor is connected to the neutral. 'lhe rotor is provided with a linger or pointer 22. whose movement is limited by stops 23 23, as in the case of' the previouslydescribed instrument, and an index 24 and card 25, similar to those of' the aforesaid instrument, are provided. A device f'or manually swinging the index 24 is provided, the same conveniently consisting ofl a spindle 26, having an upturned end 27 and mounted in a sleeve or bearing 28, so as to permit of its being rocked manually by a milled thumb-wheel 29 outside of the casing of the device. The upturned end 27 is located between prongs 30 30, attached to the index 24, so that by a turning movement ofl the spindle 26 in one direction or the other the index 24 will be turned to one side or the other. The operation of' this device is substantially the same as that of Figs. 1 and 2. By connecting the three wires of the threephase system to the binding-posts 19, 20, and 21, respectively, the rotor, with its linger 22, is caused to rotate to one side orA the other of' the middle position, and thereby indicate the direction of phase rotation. hen desired, the index 24 is used to secure or ascertain the relative phase rotation of' two or more different systems by being set after the indication of one of such systems has been made.

The device shown in Fig. 4 is a device operating on the principle of' a dielectric hysteresis motor. It is constructed with three wing-segments 31 31 31, which are connected with binding-posts 32, 33, and 34. The device is provided with a centrally-mounted rotary disk 35 of' mica or similar material, the arrangement being' such that when the three conductors of the three-phase system are connected with the binding-posts 32, 33, and 34 the mica disk is caused to rotate or turn in one direction or another, according to the phase rotation of the system. The mica rotor 35 is provided with a pointer or finger 36, Which turns with it, and an index 37 and card 38 are provided, as in the case of the preceding devices. The index 37 is arranged to be turned manually by a spindle 39,

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similar -to the spindle Q6 ot' the device ot` Fig'. ii. rllhe use ot this device ot' Fig. a is similar to that otl the two foregoing devices, the linger 36 being turned or swung' to one direction or the other, according' as the phase rotation is in one way or the other, and the index 3T is employed, as previously set torth. in eonnection with the other devices.

rlhe tlu'ee devices hereinabove set torth are shown t'or the purpose otI illustrating' the principle ot' operation ot' my present invention. lt will be understood that other devices operable by a polyphase system can be employed without departing' t'rom the spiritot' the invention and also that changes and modifications can be made in the devices herein set forth and described without causing' such a departure.

it will be seen that the devices are simple and inexpensive and can be employed to great advantage wherever desired and that their use permitsl the instantaneous and ready ascertainment o t' the sequence ot phases either actually or relatively in one or more polyphase systems.

l. A.deviceoltheclassspecilied,comprising' means operable by the energy ot' a polyphase system. and means whereby such operation can be interpreted to indicate the direction ot phase rotation with ret'erence to the leads o't' said system, substantially as described.

'2. Adeviceottheclassspecilied,comprising a movable member, means whereby said member is moved in diti'erent directions by the energy ot polyphase systems, and means whereby such diti'erent movements can be interpreted to indicate the direction ot' phase rotation with relierence to the leads of said system, sulistantiallyv as described.

l. A dev ice otl the class specilied, comprising' a rotary member, means wherebysaid member can be given a rotative movement in one direction or another according to the direction ot' phase rotation, and means whereby such rotative movements can be interpreted to indicate the direction otl phase rotation with reterence to the leads ot' said system, substantially as described.

l. .\deviceottheclassspecilied,comprising a rotary member, means whereby said member can be rotated in opposite directionsaccording' to the direction ot' phase rotation, a pointer carried b v said rotary member, and a card or tablet bearing inscriptions to indicate the direction ot' phase rotation relatively to the leads ol the system according' as the pointer moves in one direction or the other, substantially as described.

5. A\deviceottheclassspecitied,comprising a rotary member, means whereby said member can be rotated in opposite directions according' to the direction ol' phase rotation, a pointer carried by said rotary member, a card or tablet bearing' inscriptions to indicate the phase rotation according as the pointer moves in one direction or the other, and a manually-operable index adapted to be set to indicate the direction in which the pointer has moved, substantially as described.

t3. A device ot'the classspecilied, comprising a rotary member carrying' a pointer, means whereby polyphase energy will give said 1'0- tary member a rotative movement in one direction or another according to the direction ot phase rotation, a card bearing inscriptions to indicate the direction ot phase rotation, an index in the torni otl a centrally-mounted rotary linger, and means for manually turning' said linger, substantially as described.

T. Adeviccot'the classspecilied,comprising inductively-related members, one otI which is mounted t'or rotation relative to the other, and means whereby the rotary movement ot said member in opposite directions, can be interpreted to indicate the direction ot' phase rotation relatively to the leads ot' the system, substantially as described.

8. A device. ot' the class specilied, comprising' an iinluctively-related lield and armature, a pointer carried by the armature, and a card or tablet indicating the direction ot phase rotation relatively to the leads otl the system, substantially as described.

9. A device ot the class specilied, comprising' an inductively-related lield and armature, a pointer carried by the armature, a card or tablet indicating the direction ol phase rotation relatively to the leads ot the system, and stops tor limiting' the movement ot' the armature in opposite directions, substantially as described.

l0. A device ot' the class specilied, comprising an inductivcly-related lieltl and armature, a pointer carried by the armature, a card or tablet indicating the direction ot' phase rotation which causes movement ot' the armature in opposite directions, and an index t'or marking the direction ot' movement ot said pointer, substantially as described.

1l. A device ot' the class specilied, comprising an inductivelysrelated lield and armature, a pointer carried by the armature, a card or tablet indicating the direction ot` phase rotation which causes movement olI the armature in opposite directions, stops for limiting' the movement otl the armature in opposite directions. and an index lor marking the direction ol movement ot' said pointer, substantially as described.

In witness whereot l hereunto subscribe my name this 30th day ot April, A. l). 190i.

RUDOLPH F. SCI IUUI IARD'L.

lVitnesses:

A. Mmmm. Britannia), l. U. Lien.

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